CN215463268U - Erosion-proof protection mechanism for absorption tower spray beam - Google Patents

Abstract

The utility model belongs to the technical field of maintenance of spraying equipment, and particularly relates to an anti-erosion protection mechanism for a spray beam of an absorption tower, which comprises a strip-shaped sheath, wherein the strip-shaped sheath comprises a strip-shaped top plate, a first strip-shaped side plate and a second strip-shaped side plate which are jointly encircled to form a strip-shaped through groove, the strip-shaped sheath is matched and covered on the spray beam through the strip-shaped through groove, a strip-shaped mounting plate is arranged under the strip-shaped sheath, the strip-shaped mounting plate is installed on the strip-shaped sheath in a fastening and matching mode through bolts, a spacing cavity is formed between the spray beam and the strip-shaped mounting plate after the spray beam is covered by the strip-shaped sheath, and water outlet holes communicated with the spacing cavity are formed in the strip-shaped mounting plate.

Description

Erosion-proof protection mechanism for absorption tower spray beam

Technical Field

The utility model belongs to the technical field of maintenance of spraying equipment, and particularly relates to an erosion protection mechanism for a spray beam of an absorption tower.

Background

The 1000MW ultra-supercritical pressure double reheating unit in the thermal power generation industry adopts a limestone wet desulphurization process at present, flue gas flows through a desulphurization absorption tower (a spray tower), and a spray mechanism in the absorption tower sprays slurry downwards to react with the flue gas, so that sulfur dioxide in the flue gas is removed.

In order to improve the desulfurization effect on flue gas, a plurality of spraying layers are arranged in the inner cavity of the absorption tower, and the spraying layers are respectively positioned at different height positions. The spraying layer mainly comprises a spraying beam, a spraying main pipe, branch pipes and nozzles, wherein the spraying beam is fixedly connected to the wall of the inner cavity of the absorption tower, and the spraying main pipes are respectively matched and arranged on the beam body of the spraying beam in a penetrating way, so that the spraying beam is equivalent to the main pipe and even the whole spraying layer.

Because each layer sprays the layer and sets up from top to bottom, the spun thick liquid of top inevitably has some to fall on the below sprays the roof beam to because spraying the roof beam and being fixed setting, can lead to certain position or certain region on the below sprays the roof beam to continuously receive the erosion and corrosion of thick liquid under the continuous operation that sprays. Most of the existing spray beams are made of common steel materials, the corrosion resistance is not high, and even if protective measures such as anticorrosive glue, anticorrosive paint and the like are coated on the surfaces of the spray beams, the dropped slurry continuously scours the spray beams and finally scours the protective layers, so that the scouring erosion of the spray beam body can be delayed instead of being avoided.

After the mechanical property of the spray beam is reduced, the support stability of the whole spray layer is inevitably influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an anti-erosion protection mechanism for a spray beam of an absorption tower, which comprises a strip-shaped sheath, the length direction of which is parallel to the spray beam, the strip-shaped sheath comprises a strip-shaped top plate, the plate surface of which is horizontal, two long edges of the strip-shaped top plate respectively extend vertically downwards to form a first strip-shaped side plate, the plate surface of which is vertical, and a second strip-shaped side plate, the plate surface of which is vertical, so that a strip-shaped through groove, the notch of which is vertically downward and the length direction of which is consistent with that of the strip-shaped sheath is arranged on the strip-shaped sheath which is defined by the strip-shaped top plate, the first strip-shaped side plate and the second strip-shaped side plate together, the strip-shaped sheath is vertically downwards matched and covered on the spray beam through the strip-shaped through groove on the strip-shaped sheath,

the body of the spray beam is provided with a main spray pipe in a penetrating way in a matching way, the main spray pipe is vertical to the length direction of the spray beam in the length direction, wherein a plurality of main spray pipes are arranged on the spray beam in a penetrating way at intervals along the length direction of the spray beam in a matching way,

the first strip-shaped side plate is provided with first through holes communicated with the two plate surfaces of the main spray pipe at positions corresponding to the main spray pipe, the second strip-shaped side plate is provided with second through holes communicated with the two plate surfaces of the main spray pipe at positions corresponding to the main spray pipe, the main spray pipe penetrates through the corresponding first through holes and the second through holes when the strip-shaped sheath is vertically and downwards matched with and covered on the spray beam through the strip-shaped through grooves on the strip-shaped sheath,

the first through hole is communicated with the bottom edge of the first strip-shaped side plate downwards, the second through hole is communicated with the bottom edge of the second strip-shaped side plate downwards, the design is to more conveniently cover the strip-shaped protective sleeve on the spray beam,

the bottom of the first strip-shaped side plate extends outwards along the horizontal direction to form a first connecting plate with a horizontal plate surface, a plurality of first mounting holes communicated with the upper plate surface and the lower plate surface of the first connecting plate are arranged on the first connecting plate at intervals along the length direction of the first connecting plate,

the bottom of the second strip-shaped side plate extends outwards along the horizontal direction to form a second connecting plate with a horizontal plate surface, a plurality of second mounting holes communicated with the upper plate surface and the lower plate surface of the second connecting plate are arranged on the second connecting plate at intervals along the length direction of the second connecting plate,

a bar-shaped mounting plate with a horizontal plate surface and parallel to the bar-shaped sheath in the length direction is arranged right below the bar-shaped sheath, connecting holes communicated with the upper plate surface and the lower plate surface of the bar-shaped mounting plate are respectively arranged on the bar-shaped mounting plate corresponding to each first mounting hole and each second mounting hole, the bar-shaped mounting plate is simultaneously and cooperatively arranged in the first mounting hole/the second mounting hole and the corresponding connecting holes through bolts and is cooperatively screwed by nuts, so that the bar-shaped mounting plate is fixedly and cooperatively mounted on the bar-shaped sheath,

the spray beam is completely embedded into the groove cavity of the strip-shaped through groove upwards, and a space exists between the bottom surface of the spray beam and the notch of the strip-shaped through groove, namely a spacing cavity exists between the spray beam and the strip-shaped mounting plate,

and a plurality of water outlet holes communicated with the upper plate surface and the lower plate surface of the strip-shaped mounting plate and the spacing cavities are arranged on the strip-shaped mounting plate at intervals along the length direction of the strip-shaped mounting plate.

Drawings

FIG. 1 is a schematic structural view of an erosion protection mechanism for a spray beam of an absorption tower according to the present invention,

FIG. 2 is a schematic structural view of the protection mechanism of the present invention when installed on a spray beam of an absorption tower (wherein, the front side and the right side of FIG. 2 are shown in cross section, spray branch pipes and nozzles are not shown),

figure 3 is a cross-sectional view (elevation) of a-a of figure 2,

wherein, 1-spray beam, 2-strip sheath, 21-strip roof, 22-first strip side plate, 221-first perforation, 222-first connecting plate, 2221-first mounting hole, 23-second strip side plate, 231-second perforation, 232-second connecting plate, 3-spray header, 4-strip mounting plate, 42-water outlet, 5-bolt, 6-nut, 7-compartment.

Detailed Description

It should be noted that the words "horizontal", "vertical", "positive" and "disposed" as used in the description of the utility model refer to directions in the drawings, and "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component, which are merely for convenience in describing the utility model and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

As shown in the attached drawings, the erosion protection mechanism for the spray beam of the absorption tower comprises a strip-shaped sheath 2 (only two ends of the length direction of the spray beam 1 are respectively and fixedly connected to the inner cavity wall of the absorption tower, and the strip-shaped sheath 2 is not fixed with the absorption tower) parallel to the spray beam 1 in the length direction, firstly, the spray beam 1 is made of Q235A-type steel, and does not have corrosion resistance, the length direction of the spray beam 1 is horizontally arranged (the spray beam 1 is a vertically arranged strip-shaped cuboid structure), and a spray main pipe 3 is arranged on the beam body of the spray beam 1 in a penetrating manner in a matching manner: a plurality of main spray pipes 3 are arranged on the spray beam 1 at intervals along the length direction of the spray beam 1 and are penetrated in a matching way, each main spray pipe 3 is horizontally arranged in the length direction, each main spray pipe 3 is vertical to the length direction of the spray beam 1 in the length direction,

the strip-shaped sheath 2 comprises a strip-shaped top plate 21 with a horizontal plate surface, two long edges of the strip-shaped top plate 21 respectively extend vertically downwards to form a first strip-shaped side plate 22 with a vertical plate surface and a second strip-shaped side plate 23 with a vertical plate surface, the strip-shaped sheath 2 defined by the strip-shaped top plate 21, the first strip-shaped side plate 22 and the second strip-shaped side plate 23 together is provided with a strip-shaped through groove with a vertically downward notch and a length direction consistent with that of the strip-shaped sheath 2, the strip-shaped sheath 2 is vertically downwards matched and covered on the spray beam 1 through the strip-shaped through groove on the strip-shaped sheath, and the spray beam 1 is upwards and completely embedded into a groove cavity of the strip-shaped through groove,

the positions of the first strip-shaped side plate 22 corresponding to the main spray pipes 3 are respectively provided with a first through hole 221 communicated with the two plate surfaces of the main spray pipes, the first through hole 221 is communicated with the bottom edge of the first strip-shaped side plate 22 downwards, the positions of the second strip-shaped side plate 23 corresponding to the main spray pipes 3 are respectively provided with a second through hole 231 communicated with the two plate surfaces of the main spray pipes, the second through hole 231 is communicated with the bottom edge of the second strip-shaped side plate 23 downwards, when the strip-shaped protective sleeve 2 is vertically and downwards matched with and covered on the spray beam 1 through the strip-shaped through groove on the strip-shaped protective sleeve, the main spray pipes 3 are also simultaneously penetrated in the corresponding first through hole 221 and second through hole 231,

a plurality of spray branch pipes with the length directions perpendicular to the length direction of the main spray pipe 3 are horizontally and outwards extended from the pipe body of the main spray pipe 3 positioned outside the spray beam 1 and/or the strip-shaped sheath 2, one ends of the spray branch pipes, which are far away from the main spray pipe 3, in the length direction are communicated with nozzles, and the liquid sprayed out of the nozzles is vertically downward (not shown in the attached drawing);

the bottom of the first strip-shaped side plate 22 extends outwards along the horizontal direction to form a first connecting plate 222 with a horizontal plate surface, the bottom of the second strip-shaped side plate 23 extends outwards along the horizontal direction to form a second connecting plate 232 with a horizontal plate surface, both the first connecting plate 222 and the second connecting plate 232 are of strip-shaped structures and are parallel to the length direction of the strip-shaped sheath 2 in the length direction, a plurality of first mounting holes 2221 communicated with the upper plate surface and the lower plate surface of the first connecting plate 222 are arranged on the first connecting plate 222 at intervals along the length direction, a plurality of second mounting holes communicated with the upper plate surface and the lower plate surface of the second connecting plate 232 are arranged on the second connecting plate 232 at intervals along the length direction, both the first mounting holes 2221 and the second mounting holes are vertically arranged in the axial direction,

a bar-shaped mounting plate 4 with a horizontal plate surface and a length direction parallel to the bar-shaped sheath 2 is arranged under the bar-shaped sheath 2, connecting holes communicated with the upper plate surface and the lower plate surface of the bar-shaped mounting plate 4 are respectively arranged on the bar-shaped mounting plate 4 corresponding to the first mounting holes 2221 and the second mounting holes, the connecting holes are vertically arranged in the axial direction, the bar-shaped mounting plate 4 is simultaneously matched and penetrated in the first mounting holes 2221/the second mounting holes and the corresponding connecting holes and is matched and screwed by nuts 6, so that the bar-shaped mounting plate 4 is fixedly arranged on the bar-shaped sheath 2 upwards and is tightly attached to the surfaces of the first connecting plate 222 and the second connecting plate 232 on the bar-shaped sheath 2,

when the strip-shaped sheath 2 is vertically downwards matched and covered on the spray beam 1 through the strip-shaped through groove on the strip-shaped sheath, the spray beam 1 is completely accommodated into the groove cavity of the strip-shaped through groove, and a space exists between the bottom surface of the spray beam 1 and the notch of the strip-shaped through groove, namely, a spacing cavity 7 exists between the spray beam 1 and the strip-shaped mounting plate 4 (when the strip-shaped sheath 2 is matched and covered on the spray beam 1, the spacing cavity 7 is communicated with the outside (comprising the upper plate surface of the first connecting plate 222 and the upper plate surface of the second connecting plate 232) through the lower part of the first through hole 221 and the lower part of the second through hole 231),

meanwhile, a plurality of water outlet holes 42 communicated with the upper plate surface and the lower plate surface of the strip-shaped mounting plate 4 and communicated with the spacing cavities 7 are arranged on the strip-shaped mounting plate 4 at intervals along the length direction of the strip-shaped mounting plate 4.

The strip-shaped sheath 2 (the strip-shaped top plate 21, the first strip-shaped side plate 22 and the second strip-shaped side plate 23) and the strip-shaped mounting plate 4 are made of 2205 alloy materials, and have good wear resistance and corrosion resistance.

Firstly coating a conventional anticorrosive coating on the surface of a spray beam 1, then tightly installing a strip-shaped sheath 2 and a strip-shaped mounting plate 4 on the spray beam 1 through a bolt 5 in a matching way, enabling the strip-shaped sheath 2 to completely cover the spray beam 1 downwards by depending on the gravity of the strip-shaped sheath 2 and the strip-shaped mounting plate 4 and enabling a separation cavity 7 (cavity) to be formed between the spray beam 1 and the strip-shaped mounting plate 4, so that slurry falling from the spray layer above cannot directly wash the spray beam 1, thereby protecting the spray beam 1,

considering that the strip-shaped sheath 2 can be shaken off from the spray beam 1 due to the continuous vibration (shake) of the main spray pipe 3 and the disturbance of the smoke in the absorption tower in the actual operation process of the absorption tower, the strip-shaped mounting plate 4 and the strip-shaped sheath 2 are fastened together by bolts and wrap the spray beam 1 to realize the stable installation,

further, because the spray beam 1 has a certain length, the strip-shaped sheath 2 is matched with the spray beam 1 in length, if the strip-shaped mounting plate 4 below is too short along the length direction of the strip-shaped sheath 2 and/or the spray beam 1, for example, a rod-shaped object perpendicular to the strip-shaped sheath 2 and/or the spray beam 1 in length direction is adopted, and two ends of the rod-shaped object are respectively connected with the strip-shaped mounting plate 4, and the rod-shaped object is also easy to break under the long-time continuous shaking of the strip-shaped sheath 2, therefore, the strip-shaped mounting plate 4 in the scheme is parallel to the strip-shaped sheath 2 and/or the spray beam 1 in length direction, can be shorter than the strip-shaped sheath 2 and/or the spray beam 1 in length, but can not be too short, so that the bottom of the spray beam 1 is opposite to the top of the strip-shaped mounting plate 4,

on the basis of the above (considering that the strip-shaped jacket 2 is convenient to install and cover the spray beam 1 during operation), the first through hole 221 and the second through hole 231 are all completely communicated with the bottom edge of the side plate where the first through hole 221 and the second through hole 231 are located, as shown in fig. 1, so that part of the slurry falling on the strip-shaped jacket 2, the first connecting plate 222 and the second connecting plate 232 can easily flow into the cover cavity of the strip-shaped jacket 2 to contact with the spray beam 1 through the area (the area is encircled by the dotted line in fig. 2, the spray main pipe 3 is a circular pipe, and the through holes cannot be completely filled) not filled on the first through hole 221 and the second through hole 231, but even then, compared with the slurry directly washing from a high position to the spray beam 1, the erosion influence of the relatively gentle contact on the spray beam 1 is reduced,

as a further improvement, a spacing cavity 7 is formed between the spray beam 1 and the strip-shaped mounting plate 4 through size control in the scheme, so that slurry flowing into the cover cavity of the strip-shaped sheath 2 can be accommodated in the spacing cavity 7 and does not contact the bottom surface of the spray beam 1, and even if the protection mechanism of the scheme shakes on the spray beam 1 to a certain extent, the part of slurry does not always contact the spray beam 1; meanwhile, the strip-shaped mounting plate 4 is provided with a water outlet 42 communicated with the spacing cavity 7, so that slurry flowing into the cover cavity of the strip-shaped sheath 2 is discharged in time, and the increased contact erosion risk to the spray beam 1 caused by accumulation of the slurry in the spacing cavity 7 is avoided.

In contrast, if the strip-shaped mounting plate 4 is closely attached to the bottom surface of the spray beam 1 after being fastened to the strip-shaped sheath 2 by bolts and no space is left, slurry can also permeate into the gap between the spray beam 1 and the strip-shaped mounting plate 4 and greatly contact with the bottom surface of the spray beam 1 to corrode; in addition, in this case, the slurry may be exposed to the lower side of the shower beam 1 to cause erosion. It can be seen that the blocking manner is not ideal for the isolation effect of the slurry, but the scheme is to convert the blocking design into the targeted outward guidance of the slurry.

Protection mechanism (bar sheath 2 and bar mounting panel 4) in this scheme is installed on spraying roof beam 1 for detachably, when protection mechanism is destroyed to a certain extent by the thick liquid erosion, is convenient for change.

Claims (10)

1. The utility model provides an absorption tower sprays roof beam and loses protection mechanism with scour protection which characterized in that: the protection mechanism comprises a strip-shaped sheath (2) parallel to the spray beam (1) in the length direction, the strip-shaped sheath (2) comprises a horizontal strip-shaped top plate (21), two long edges of the strip-shaped top plate (21) respectively extend downwards vertically to form a first strip-shaped side plate (22) vertical to the surface and a second strip-shaped side plate (23) vertical to the surface, the strip-shaped top plate (21), the first strip-shaped side plate (22) and the second strip-shaped side plate (23) jointly enclose the strip-shaped sheath (2) with a downward vertical notch and a strip-shaped through groove consistent with the strip-shaped sheath (2), and the strip-shaped sheath (2) is covered on the spray beam (1) through the vertical downward matching of the strip-shaped through groove.

2. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 1, wherein: the body of the spray beam (1) is provided with a main spray pipe (3) in a matching and penetrating way, a plurality of main spray pipes (3) are arranged on the spray beam (1) at intervals along the length direction of the spray beam (1) in a matching and penetrating way,

the position that corresponds each on first bar curb plate (22) spray and be responsible for (3) is seted up the first perforation (221) of its two faces of intercommunication respectively, correspond each on second bar curb plate (23) spray the position that is responsible for (3) and seted up the second perforation (231) of its two faces of intercommunication respectively, bar sheath (2) are through on it the vertical cooperation cover downwards of bar logical groove when spraying on roof beam (1), it wears to locate in the corresponding first perforation (221) and second perforation (231) to spray to be responsible for (3).

3. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 2, wherein: the bar-shaped sheath is characterized in that a bar-shaped mounting plate (4) with a horizontal plate surface and a length direction parallel to the bar-shaped sheath (2) is arranged under the bar-shaped sheath (2), and the bar-shaped mounting plate (4) is upwards fastened and mounted on the bar-shaped sheath (2).

4. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 3, wherein: the bottom of the first strip-shaped side plate (22) extends outwards along the horizontal direction to form a first connecting plate (222) with a horizontal plate surface, a plurality of first mounting holes (2221) communicated with the upper plate surface and the lower plate surface of the first connecting plate (222) are arranged on the first connecting plate (222) at intervals along the length direction of the first connecting plate,

the bottom of the second strip-shaped side plate (23) extends outwards along the horizontal direction to form a second connecting plate (232) with a horizontal plate surface, a plurality of second mounting holes communicated with the upper plate surface and the lower plate surface of the second connecting plate (232) are arranged on the second connecting plate (232) at intervals along the length direction of the second connecting plate,

the strip-shaped mounting plate is characterized in that the strip-shaped mounting plate (4) is provided with first mounting holes (2221) and second mounting holes which are corresponding to the first mounting holes (2221) and the second mounting holes respectively, the first mounting holes (2221)/the second mounting holes and the corresponding connecting holes are matched and screwed through bolts (5), and nuts (6) are used for matching to realize the fastening and mounting of the strip-shaped mounting plate (4) on the strip-shaped sheath (2).

5. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 3, wherein: the spray beam (1) is upwards and completely embedded into the groove cavity of the strip-shaped through groove, and a space exists between the bottom surface of the spray beam (1) and the notch of the strip-shaped through groove, namely a spacing cavity (7) exists between the spray beam (1) and the strip-shaped mounting plate (4).

6. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 5, wherein: and water outlets (42) communicated with the partition cavities (7) and communicated with the upper plate surface and the lower plate surface of the strip-shaped mounting plate (4) are arranged on the strip-shaped mounting plate (4) at intervals along the length direction of the strip-shaped mounting plate (4).

7. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 2, wherein: the spraying main pipe (3) is horizontally arranged in the length direction, and the spraying main pipe (3) is vertical to the length direction of the spraying beam (1) in the length direction.

8. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 2, wherein: the first through hole (221) is communicated with the bottom edge of the first strip-shaped side plate (22) downwards, and the second through hole (231) is communicated with the bottom edge of the second strip-shaped side plate (23) downwards.

9. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 4, wherein: the first connecting plate (222) and the second connecting plate (232) are both of strip-shaped structures and are parallel to the length direction of the strip-shaped sheath (2) in the length direction.

10. An erosion protection mechanism for a spray beam of an absorption tower as claimed in claim 2, wherein: the spraying main pipe (3) is positioned on the spraying beam (1) and/or the pipe body outside the strip-shaped sheath (2), a spraying branch pipe horizontally extends outwards, and one end, far away from the spraying branch pipe, of the spraying main pipe (3) in the length direction is communicated with the nozzle.

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